Thread: Moa help

Hi I just want some help to check if I'm doing this right, I sighted in a new scope and zeroed it at 200yds bullet dropped 10inch at 300, 32inch at 400, and 62inch at 500yds, now here is my prob, 500yds is 5 moa, 62 divide by 5 is 12 so I should adjust 12 moa is this correct? Because when I do this I was shooting well over the target I had to adjust back to 9 moa to hit the target and could not make sense of it, calibre is 308 scope is leupold mark 4 LR/T 8-25, any help would be appreciated